<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单区域 -->
      <el-form
        label-width="0px"
        class="login_from"
        :model="loginFrom"
        :rules="loginFromRules"
        ref="loginFromRef"
      >
        <!-- 用户 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginFrom.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="pwd">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginFrom.pwd"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="reset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginFrom: {
        username: 'admin',
        pwd: '123456'
      },
      // 表单验证
      loginFromRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        pwd: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  methods: {
    reset() {
      // resetFields()方法可以进行表单重置
      this.$refs.loginFromRef.resetFields()
    },
    login() {
      // validate预验证 第一个参数是布尔值
      this.$refs.loginFromRef.validate(val => {
        console.log(val)
        if (!val) return
        this.$axios({
          method: 'post',
          url: 'login',
          data: {
            username: this.loginFrom.username,
            password: this.loginFrom.pwd
          }
        })
          .then(res => {
            // console.log(res.data.meta.status);
            if (res.data.meta.status !== 200)
              return this.$message.error('登录失败')
            this.$message.success('登录成功')
            // 把token保存到sessionStorage  只有打开页面有效
            // console.log(res.data);
            sessionStorage.setItem('token', res.data.data.token)
            // 通过编程式导航跳转到后台主页
            this.$router.push('/home')
          })
          .catch(err => {
            console.log(err)
          })
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    overflow: hidden;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_from {
  position: absolute;
  width: 100%;
  bottom: 0;
  padding: 0 15px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
